Gate lifting and releasing mechanism for elevators



A. H. PACKARD.

GATE LIFTING AND RELEASING MECHANISM FOR ELEVATORS.

APPLICATION FILED AUG.22, 1921.

1 2 5 3 3g 0 Patented Aug. 8, 1922.

ALDEY H. PACKARD, OE NOBURN, IVIASSACH'USETTS, ASSIGNOR OF ONE-HALF TO J. DONALD ROBBINS, OF BOSTON, MASSACHUSETTS.

GATE LIFTING AND RELEASING MECI-IANISIVI FOR ELEVATORS.

T all whom it may concern:

Be it known that I, ALDEN H. PACKARD, citizen of the United States, residing at lVoburn, in the county of Middlesex and State of Massachusetts, have invented new and useful amproveincnts in Gate Lifting and Releasing ll-iechanism tor Elevators, of which the following is a specification.

This invention relates to a gate operating attachment carried by a freight elevator car and including a gate engaging member adapted, when the car is ascending, to first engage and lift and then release a gate or a series oi gates controlling access to the elevator well, and, in descending, to be displaced and to pass by all the closed gates in its path.

The object of the invention is to provide a simple, durable and effective mechanism adapted to be conveniently installed on a car without material modification or alteration of the car, and of such nature that a gate 0t ordinary construction maybe readil v adapted tor cooperation therewith. I

The invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings forming a part of this specification,

Figure 1 is a side elevation showing an attachment embodying the invention and portions of a car and of a gate.

Figure 2 is a top plan view of the attachment.

Figure 3 is a view similar to Figure 1 on a reduced scale and showing a portion of the platform of the elevator the entire length of the gate and portions of a building.

Figure 4 is a perspective view of the head portion of the attachment.

Figure 5 is a perspective view of the projection attached to the gate to adapt it for cooperation with the attachment.

Figure 6 is a fragmentary view similar to portions of Figure 1 showing the head partially displaced from its normal position.

Figures 7, 8, 9, 10 and 11 are fragmentary views illustrating the operation.

The same reference characters indicate the same parts in all of the figures.

An attachment embodying my invention includes a holder adapted to be attached to a portionoif an elevator such as one of the uprights 12 rising from the elevator platform 13. said holder being formed to project out-ward from the portion to which Specification of Letters Patent.

Application filed August 22, 1921. Serial No. 494,046.

it is attached and to support at its outer portion a hinge connecting a tilting head with the holder. [is here shown the holder is substantially triangular and includes a vertical base 1& seated on the upriglit12' and attached thereto by bolts or screws 15, said base being preferably aflat sided metal strip or bar, and an angular portion, preterhead and perforated to receive the pintle 21.

The said hinge connection is located between opposite ends of the head andper- Inits the head to tilt on a substantially horizontal axis. The head is provided at its opposite end portions with V-shaped strikers 2a and arranged in tandem order, one being above and the other below said hinge connection. The head and its strikers are preferably formed'by imparting to a metal var of the same cross section as those forming the holder, two V-shaped bends constituting the strikers.

. The head is normally maintained with the strikers in vertical alinement with each other by means preferably embodied as next described. To the head are fixed vertical plates 27 bridging the reentrant inner sides of the strikers, each plate being attached at one end by a bolt 28 and at its opposite end by a stud 29 entering a socket in the head. The plates 27 are provided with apertures; ,.30 through which loosely passthe outer end portions oi: spring-supporting bolts 31. Said bolts are pivoted at 32 to the plates 27 and are extended through orifices or guides 33 in the ears 17 and base 14: of the holder. With the outer end portions of the rods'31 are engaged spring abutme'nts, each preferably formed b a washer 35 and nuts 36, the latter engaging screw threaded portions of the rods. tween the said abutments and the ears 17 are interposed springs 38 of equal force and acting to hold the strikers in vertical alinement with each other and. to permit either striker to be displaced inward and the other outward.

40 represents a gate adapted to-slide verof a Wooden 131001944 attached to the upper portiono't the gate; and a metal shoe or relnl'orcing platelet-5 attached tothe block.

The apex oi? the projection is in the path of the strikers andthe arrangement is such that the operation may be aslollows:

Vthen the elevator is ascending ijrom a )Ollli) below a closed 'ate t0 the inner l e a ll striker :24lfstrilzes the gate projection as in-= dicated by Figure 1, and lifts the gate until. the'latter is arrested by the face 42, as shown by Figure fore stopping moves upward far enoughto carry the upper StllkQPabOVG thegate proj ection, the upper spring 38 yields and the head22 isfirsttilted as shown byFigure 6,

and then returns to its normalposition so that the gate pro ection isbetween the strile ers when 1 the elevatorstops, the gate being arrested by the lower striker 25, as indicated by dotted lines in :Figure 7. If the ascent of the elevator 1S (JOIltlllllGCltliG lower spring 38 yieldsandthe lheadgis again tilted until: the lower str1ker-25 rides across the apex gate projection The gate now drops to its closed posit1oni lVhen the elevator 1s descend1ng and the lower str ker 25 encounters a projection on a closed gate. arrested bya floor 41,1tl1is striker is: displaced by the pro jcction, asindicated by Figure 9, and passes below the PIOJGCiJlOl'lyELS shown by Figure 10. If the: descent of the elevator is continued, the upper striker 24 then encounters and is displacedby the gate-projection, as shown by Figure 11, and finally leaves said projectiom the head being thenrestored to its normal position. The upright 12 is provided Withsockets 4:7 forrnedto permit' the necessary endwise movements ot-the rods 31 caused-by the tilting of thehead.

ll hen the elevator is descending the gates remalnclosed, the+str1kers slipping across the: project-ions of the several gates. When the elevator stopswin its descentat any floor,

ward iorndownward :ELI'lCl releases the Egate If the elevator isstopped in the position shown byFigure 3, the upper striker 1 holds the gate open until the elevator isi-again moved. If the elevator be It will now be seen that the gates are automaticallyraised only when the elevator is ascending.

Iclaimr a 1. A gate lifting and releasing attach ment for elevators, comprising a holder having means for rigid attachment to an eleva tor, a tilting head, hinge connection between the holder and head permitting the holder to tilt on a substantiallyhorizontal axis the'headbeingprovided at opposite end portions'ivith ll-shaped strikers arranged in tandem order, one above and-the other below said hinge connection, and means for yieldingly maintaining the head with itsstrikers' invertical alinement with each other; the upper striker'being adapted to engagea'projectionon a gate and lift the latter When 1 theelevator is ascending, the upper and lower strikers being adapted to be successively displaced by said projection when' the elevator is ascending and the-raised gate is arrested, and the lower and upper striker be ing successively displaceabl'e by the projection whentheelevator is descending and the gate is closed.

2. 'A gate llftll'lgi and releasing attachment foryelevators; comprising a holder having means :lorrigid attachment to an elevator tilting head, a hinge connection between the holder and head permittingthe holder to tilt on a substantially horizontal axis, the

head being provided at opposite end portions with ll-shaped strikers arranged"in tandem 'order,' one "above and the other be- 1 low said hinge connection, springs arranged of the gate projection, the lower spring then acting to return the head to its normal po sition when thedower striker is above the a to act on the opposite enclportionsof the head and yieldingly maintain the headwith its strikersin vertical alinement With each other and means for supporting said springs in their operative relation to the head. i

3. A gate;-lifting.iandlreleasing attachment for elevators, comprising a substantially triangular holder,- inclnding tar base portion seated onand adapted to be attached to an upright portion ot'an elevator, and an angular bar" attached atits ends to said base i and having-uasocket at its apex, a tilting head having inwardly pro ectlng hinge members nndway between 1 55 ends; a plntle engagedwith said hiugemembers and With' the holder socket, said ears, plntle and socket constituting ahinge connection between the holder and the headpermitting the head to tilt 011a substantially horizontal axis; the head being provided at its end portions'with V-shaped strikers arranged in tandem order, oneabove andithe other below sai'd hinge connection, and means for yieldingly mamtannng the -:head W1th 1ts strikers in vertical alinement with each other; said strikers being adapteditecooperate as de-- scribed lwith a projectionxon a gate 4:. Agate litting and releasing attachment forv elevators; comprislng'; a holder having;

tandem order, ne above and the other below said hinge connection, spring supporting rods pivotally connected with opposite end portions of the head adjacent to the strikers and movable endwise in guides in the holder, spring abutments on the outer end portions of said rods, and springs supported by said rods between said abutments and portions of the holder, said springs yieldingly maintaining the head with its strikers in vertical alinenient with each other and permitting the described cooperation of the strikers with a projection n a gate.

5. A gate lifting and releasing attachment for elevators, comprising a substantially triangular holder, including a base portlon seated on and adapted to be attached to an upright portion of an elevator, and an angular bar attached at its ends to said base and having a socket at its apex, a tilting head composed of a bar provided midway between its ends with rearwardly projecting ears, a hinge pintle engaged with said ears and with the holder socket to form a hinge connection between the holder and head per mitting the head totilt on a substantially horizontal axis, the end portions of the headforming bar being bent to form V-shaped strikers arranged in tandem order, one above and the other below said hinge connection, apertured plates attached to the head and bridging the inner sides of the bent striker-forming portions, spring-supporting rods passing loosely through the apertures in said plates and pivoted to the latter, said rods being movable endwise in guides in the holder, nuts engaged with said rods and forming adjustable spring abutments on the outer end portions of the rods, and springs supported by the rods between said abutments and portions of the holder, said operation of the strikers with a projection,

on a gate, a

In testlmony whereof I have afiixed my signature.

ALDEN H. PACKARD. 

